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Effects of shifts in the rate of repetitive stimulation on sustained attentionThe effects of shifts in the rate of presentation of repetitive neutral events (background event rate) were studied in a visual vigilance task. Four groups of subjects experienced either a high (21 events/min) or a low (6 events/min) event rate for 20 min and then experienced either the same or the alternate event rate for an additional 40 min. The temporal occurrence of critical target signals was identical for all groups, irrespective of event rate. The density of critical signals was 12 signals/20 min. By the end of the session, shifts in event rate were associated with changes in performance which resembled contrast effects found in other experimental situations in which shift paradigms were used. Relative to constant event rate control conditions, a shift from a low to a high event rate depressed the probability of signal detections, while a shift in the opposite direction enhanced the probability of signal detections.
Document ID
19760029479
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Krulewitz, J. E.
(Iowa State University of Science and Technology, Ames, Iowa, United States)
Warm, J. S.
(Cincinnati Univ. OH, United States)
Wohl, T. H.
(Cincinnati, University Cincinnati, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
October 1, 1975
Publication Information
Publication: Perception and Psychophysics
Volume: 18
Issue: 4, Oc
Subject Category
Behavioral Sciences
Accession Number
76A12445
Funding Number(s)
CONTRACT_GRANT: NGL-36-004-014
Distribution Limits
Public
Copyright
Other

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